[Sumippi]

Ashita Lucy wa nani o shimasu ka.
=Lucy wa ashita nani o shimasu ka.

Kenta wa ashita doko e ikimasu ka.
=Ashita kenta wa doko e ikimasu ka.

These are all correct, I think. I don't see any difference in meaning (unless you're talking about 'informational structure' 'focus' or 'presupposition' etc.)